package day15;

import java.util.Scanner;

//查找输入整数二进制中1的个数
public class oj1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别

        while (in.hasNext()) {
            int a = in.nextInt();
            int count = 0;
            while (a != 0) {

                if ((a & 1) == 1) {

                    count++;
                }
                a = a >> 1;
            }
            System.out.println(count);
        }
    }
}
